Billing Systems Developer (PHP / Go)

Billing Systems Developer

We’re seeking a Billing Systems Developer to build and scale the financial systems that power Command|Link’s platform. This role sits at the intersection of engineering, finance, and data, ensuring billing is accurate, resilient, and fully auditable across a global customer base.

Key Responsibilities

• Design and develop scalable billing systems (invoicing, usage-based billing, credits, taxes, proration)
• Build and maintain ledger-based financial systems with full auditability
• Integrate with payment gateways (Stripe, ACH, etc.)
• Ensure idempotent processing to prevent duplication and inconsistencies
• Develop reconciliation workflows to detect and resolve discrepancies
• Architect resilient systems with retry, rollback, and recovery mechanisms
• Optimize and manage large financial datasets, including historical data
• Build and maintain APIs for billing serv...